The issue CBP was experiencing transmitting ACE Entry Summary Status Notification UC2 and UC8 outbound messages (referenced in CSMS # 50917122) was resolved on 2/3/2022 at 13:55 ET.
CBP technicians will manually resend the UC8s and the UC2s for summaries that moved into CBP control with Action Identification Numbers originally sent from 2/2/2022, 12:30 AM ET to 2/3/2022, 13:55 PM ET.